کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6389067 | 1329229 | 2011 | 9 صفحه PDF | دانلود رایگان |
Soil salinity is an increasing problem, including in regions of the world where chickpea is cultivated. Salt sensitivity of chickpea was evaluated at both the vegetative and reproductive phase. Root-zone salinity treatments of 0, 20, 40 and 60Â mM NaCl in aerated nutrient solution were applied to seedlings or to older plants at the time of flower bud initiation. Even the reputedly tolerant cultivar JG11 was sensitive to salinity. Plants exposed to 60Â mM NaCl since seedlings, died by 52Â d without producing any pods; at 40Â mM NaCl plants died by 75Â d with few pods formed; and at 20Â mM NaCl plants had 78-82% dry mass of controls, with slightly higher flower numbers but 33% less pods. Shoot Cl exceeded shoot Na by 2-5 times in both the vegetative and reproductive phase, and these ions also entered the flowers. Conversion of flowers into pods was sensitive to NaCl. Pollen from salinized plants was viable, but addition of 40Â mM NaCl to an in vitro medium severely reduced pollen germination and tube growth. Plants recovered when NaCl was removed at flower bud initiation, adding new vegetative growth and forming flowers, pods and seeds. Our results demonstrate that chickpea is sensitive to salinity at both the vegetative and reproductive phase, with pod formation being particularly sensitive. Thus, future evaluations of salt tolerance in chickpea need to be conducted at both the vegetative and reproductive stages.
Research highlightsⶠChickpea is sensitive to salinity and conversion of flowers to pods is particularly salt sensitive. ⶠUpon removal of salt chickpea can recover, with substantial new growth and flowering. ⶠCl toxicity might be the major cause of salt damage in chickpea. ⶠHigh Na and Cl in flowers might impede pollen tube growth, inhibiting podding.
Journal: Environmental and Experimental Botany - Volume 71, Issue 2, June 2011, Pages 260-268